Let's say that we want to make a slot that doesn't where cards for that slot don't go into the slot when played, but instead when discarded. Is this allowed?
If it is, can we place the appropriate text in the card slot, or do we have to place the text on each individual card? Can we give an alternate mechanic for playing a card if it doesn't go into the slot through being played?
Let's say that we want to make a card that generates non-slot cards, like a Firefly Queen that generates shields instead of creatures. Where would we put the card image of the supplementary card?